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/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; -*- */
// SPDX-License-Identifier: MIT OR LGPL-2.0-or-later
// SPDX-FileCopyrightText: 2008 litl, LLC
#include <atomic> // for atomic_bool
#include <memory> // for unique_ptr
#include <string> // for string
#include <errno.h>
#include <fcntl.h> // for SEEK_END
#include <stdarg.h>
#include <stdio.h> // for FILE, fprintf, fflush, fopen, fputs, fseek
#include <string.h> // for strchr, strcmp
#include "gjs/jsapi-util.h"
#ifdef _WIN32
# include <io.h>
# include <process.h>
# ifndef F_OK
# define F_OK 0
# endif
#else
# include <unistd.h> // for getpid
#endif
#include <array>
#include <glib.h>
#include "util/log.h"
#include "util/misc.h"
static std::atomic_bool s_initialized = ATOMIC_VAR_INIT(false);
static bool s_debug_log_enabled = false;
static bool s_print_thread = false;
static std::unique_ptr<LogFile> s_log_file;
static GjsAutoPointer<GTimer, GTimer, g_timer_destroy> s_timer;
static std::array<bool, GJS_DEBUG_LAST> s_enabled_topics;
static const char* topic_to_prefix(GjsDebugTopic topic) {
switch (topic) {
case GJS_DEBUG_GI_USAGE:
return "JS GI USE";
case GJS_DEBUG_MEMORY:
return "JS MEMORY";
case GJS_DEBUG_CONTEXT:
return "JS CTX";
case GJS_DEBUG_IMPORTER:
return "JS IMPORT";
case GJS_DEBUG_NATIVE:
return "JS NATIVE";
case GJS_DEBUG_CAIRO:
return "JS CAIRO";
case GJS_DEBUG_KEEP_ALIVE:
return "JS KP ALV";
case GJS_DEBUG_GREPO:
return "JS G REPO";
case GJS_DEBUG_GNAMESPACE:
return "JS G NS";
case GJS_DEBUG_GOBJECT:
return "JS G OBJ";
case GJS_DEBUG_GFUNCTION:
return "JS G FUNC";
case GJS_DEBUG_GFUNDAMENTAL:
return "JS G FNDMTL";
case GJS_DEBUG_GCLOSURE:
return "JS G CLSR";
case GJS_DEBUG_GBOXED:
return "JS G BXD";
case GJS_DEBUG_GENUM:
return "JS G ENUM";
case GJS_DEBUG_GPARAM:
return "JS G PRM";
case GJS_DEBUG_GERROR:
return "JS G ERR";
case GJS_DEBUG_GINTERFACE:
return "JS G IFACE";
case GJS_DEBUG_GTYPE:
return "JS GTYPE";
default:
return "???";
}
}
static GjsDebugTopic prefix_to_topic(const char* prefix) {
for (unsigned i = 0; i < GJS_DEBUG_LAST; i++) {
auto topic = static_cast<GjsDebugTopic>(i);
if (g_str_equal(topic_to_prefix(topic), prefix))
return topic;
}
return GJS_DEBUG_LAST;
}
void gjs_log_init() {
bool expected = false;
if (!s_initialized.compare_exchange_strong(expected, true))
return;
if (gjs_environment_variable_is_set("GJS_DEBUG_TIMESTAMP"))
s_timer = g_timer_new();
s_print_thread = gjs_environment_variable_is_set("GJS_DEBUG_THREAD");
const char* debug_output = g_getenv("GJS_DEBUG_OUTPUT");
if (debug_output && g_str_equal(debug_output, "stderr")) {
s_debug_log_enabled = true;
} else if (debug_output) {
std::string log_file;
char* c;
/* Allow debug-%u.log for per-pid logfiles as otherwise log
* messages from multiple processes can overwrite each other.
*
* (printf below should be safe as we check '%u' is the only format
* string)
*/
c = strchr(const_cast<char*>(debug_output), '%');
if (c && c[1] == 'u' && !strchr(c + 1, '%')) {
GjsAutoChar file_name;
#if defined(__clang__) || __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
_Pragma("GCC diagnostic push")
_Pragma("GCC diagnostic ignored \"-Wformat-nonliteral\"")
#endif
file_name = g_strdup_printf(debug_output, getpid());
#if defined(__clang__) || __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
_Pragma("GCC diagnostic pop")
#endif
log_file = file_name.get();
} else {
log_file = debug_output;
}
/* avoid truncating in case we're using shared logfile */
s_log_file = std::make_unique<LogFile>(log_file.c_str());
if (s_log_file->has_error()) {
fprintf(stderr, "Failed to open log file `%s': %s\n",
log_file.c_str(), g_strerror(errno));
}
s_debug_log_enabled = true;
}
if (!s_log_file)
s_log_file = std::make_unique<LogFile>(nullptr, stderr);
if (s_debug_log_enabled) {
auto* topics = g_getenv("GJS_DEBUG_TOPICS");
s_enabled_topics.fill(topics == nullptr);
if (topics) {
GjsAutoStrv prefixes(g_strsplit(topics, ";", -1));
for (unsigned i = 0; prefixes[i] != NULL; i++) {
GjsDebugTopic topic = prefix_to_topic(prefixes[i]);
if (topic != GJS_DEBUG_LAST)
s_enabled_topics[topic] = true;
}
}
}
}
void gjs_log_cleanup() {
bool expected = true;
if (!s_initialized.compare_exchange_strong(expected, false))
return;
s_timer = nullptr;
s_enabled_topics.fill(false);
}
#define PREFIX_LENGTH 12
static void
write_to_stream(FILE *logfp,
const char *prefix,
const char *s)
{
/* seek to end to avoid truncating in case we're using shared logfile */
(void)fseek(logfp, 0, SEEK_END);
fprintf(logfp, "%*s: %s", PREFIX_LENGTH, prefix, s);
if (!g_str_has_suffix(s, "\n"))
fputs("\n", logfp);
fflush(logfp);
}
void
gjs_debug(GjsDebugTopic topic,
const char *format,
...)
{
va_list args;
char *s;
if (!s_debug_log_enabled || !s_enabled_topics[topic])
return;
va_start (args, format);
s = g_strdup_vprintf (format, args);
va_end (args);
if (s_timer) {
static gdouble previous = 0.0;
gdouble total = g_timer_elapsed(s_timer, NULL) * 1000.0;
gdouble since = total - previous;
const char *ts_suffix;
char *s2;
if (since > 50.0) {
ts_suffix = "!! ";
} else if (since > 100.0) {
ts_suffix = "!!! ";
} else if (since > 200.0) {
ts_suffix = "!!!!";
} else {
ts_suffix = " ";
}
s2 = g_strdup_printf("%g %s%s",
total, ts_suffix, s);
g_free(s);
s = s2;
previous = total;
}
if (s_print_thread) {
char *s2 = g_strdup_printf("(thread %p) %s", g_thread_self(), s);
g_free(s);
s = s2;
}
write_to_stream(s_log_file->fp(), topic_to_prefix(topic), s);
g_free(s);
}
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